Hanna Instruments Australia
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Sales: (03) 9769 0666   |    Mon to Fri: 8:30am – 5:00pm
Hanna Instruments Australia
Sales: (03) 9769 0666   |    Mon to Fri: 8:30am – 5:00pm

Silver/Sulfide Half-Cell Ion-Selective Electrode (ISE) - HI4015

$1,573.34

The HI4015 is a solid state, half-cell ion selective electrode (ISE) for the determination of silver (Ag+) or sulfide (S2-) in solution. The silver/silver sulfide sensing pellet produces a potential change due to the ion exchange between the inorganic pellet membrane and the sample. The internal sensing elements are housed within a durable epoxy body.

The HI4015 is ideal for a variety of applications in water conditioning, environmental monitoring, and industrial processes.

  • Solid state sensor
  • Silver detection from 0.11 to 107, 900 mg/L Ag+
  • Sulfide detection from 0.003 to 32, 100 mg/L S2-
  • For use with HI5315 reference half-cell

The HI4015 silver/sulfide selective electrode is a potentiometric half-cell sensor housed within an epoxy body. The internal elements are isolated from the sample by a compressed silver/silver sulfide sensing membrane. This solid state sensor requires a separate reference electrode to complete the measurement system.

Hanna’s solid state half-cell ISEs are designed for use with the HI5315 reference half-cell. The reference half-cell features a cone style junction. The skirted cone geometry of the reference forms the liquid junction with the test solution at the tip of the junction cone, producing a highly stable reference potential and consistent flow rates of electrolyte into the solution. A simple press of the top portion of the ISE makes it easy to empty the electrolyte fill solution and replace when necessary.

Measuring all solutions with a constant ionic strength reduces the margin of error between measurements. The HI4015 silver/sulfide solid state ISE can measure silver from 1µM (0.11 mg/L) to 1M (107, 900 mg/L) and sulfide from 0.1µM (0.003 mg/L) to 1M (32, 100 mg/L).

Silver (Ag+)

For the HI4015 to measure silver accurately, it is important that the ionic strength of the standards and sample be adjusted to a high and constant value with the halide ionic strength adjuster (ISA) solution. The ISA ensures that the activity coefficient is constant so the concentration of free silver ions can be measured.

Conversion Table for Ag+

Multiply
moles/L (M) to ppm (mg/L) 1.0787 x 105
ppm (mg/L) to M (moles/L) 9.27 x 10-6

 

Sulfide (S2-)

For accurate sulfide measurement, it is important that sulfur is released from hydrogen and that sulfide oxidation is prevented with the sulfide antioxidant buffer solution (SAOB). The SAOB ensures that the solution pH is above pH 12, reducing the effect of interfering ions and releasing sulfur from hydrogen ions. SAOB also acts to stabilize the activity coefficient so the concentration of free sulfide ions can be measured.

Conversion Table for S2-

Multiply
moles/L (M) to ppm (mg/L) 3.207 x 104
ppm (mg/L) to M (moles/L) 3.12 x 10-5

Features at-a-glance

Fixed Sensing Modules – Solid state half-cell ISEs are electrodes that detect free ions in a solution. The highly insoluble, compressed sensing pellet is attached to the HI4015 silver/sulfide half-cell by a fixed sensing module for ease of use.

Durable Epoxy Body – The probe body of the silver/sulfide half-cell ISE is composed of durable epoxy resin.

BNC Connection – The HI4015 has a universal BNC connector for easy connection to any benchtop meter with a female BNC probe input.

Theory of Operation

A solid state sensor electrode develops a voltage due to the ion exchange that occurs between the solution and the inorganic membrane. An equilibrium occurs due to the highly limited solubility of the membrane material in the sample. When the ionic strength of the solution is fixed by the addition of ISA, the voltage is proportional to the concentration of free ions in solution. s organic ion exchange resin. When the ionic strength of the solution is fixed by the addition of ISA, the voltage is proportional to the concentration of free ions in solution.

SKU HI4015
Name Silver/Sulfide Half-Cell Ion-Selective Electrode (ISE) – HI4015
Description solid state; half-cell
Measurement Range silver (Ag+) 1M to 1 10-6M, 107,900 to 0.11 mg/L (ppm)
sulfide (S2-) 1M to 1 10-7M, 32,100 to 0.003 mg/L (ppm)
Temperature Range 0 to 80 °C
Body Material epoxy
Optimum pH Range pH 2 to 8 (silver); pH 12 to 14 (sulfide)
Body Length/Overall Length 120 mm
Outer Diameter 12 mm
Cable coaxial; 1 m (3.3’)
Connector Type BNC
Notes Approximate Slope +56 mV (silver); -28 mV (sulfide)

All prices are inclusive of GST and not all items are stock items, if you require an immediate solution please send an email to sales@hannainst.com.au or call us on (03) 9769 0666.


Free standard delivery:

We offer free delivery within Australia, typically arriving within 5 to 7 days. Delivery times may vary depending on the courier service and the recipient’s location.


Same-day express delivery:

Place your order before 1 PM Monday to Friday for the same-day express shipping. Delivery times may vary depending on the courier service and the recipient’s location.

Please note that we do not offer shipping to PO Box addresses.

All prices are inclusive of GST and not all items are stock items, if you require an immediate solution please send an email to sales@hannainst.com.au or call us on (03) 9769 0666.

Please note that we do not offer shipping to PO Box addresses.